Fibre Channel protocol. An evolving ANSI interconnection standard for
Fibre Channel wrap test. A diagnostic that causes the Ultrium 2 Tape Drive to perform a check of the Fibre Channel circuitry from and to the drive’s Fibre Channel connector or the fiber cable.
field microcode replacement tape. A tape cartridge that contains new or revised firmware (microcode) for the Ultrium 2 Tape Drive.
file. A named set of records that are stored or processed as a unit.
filemark. Located on the magnetic tape within a tape cartridge, a recorded element that typically marks the organizational boundaries in a serial file structure (such as directory boundaries) and that is requested to be written or read by the server.
firmware. The proprietary code that is usually delivered as part of an operating system. Firmware is more efficient than software that is loaded from an alterable medium, and is more adaptable to change than pure hardware circuitry. An example of firmware is the Basic Input/Output System (BIOS) in
FMR tape. See field microcode replacement tape.
foot. A unit of length comprising 12 inches.
G
Gb. See gigabit.
GB. See gigabyte.
Generation 1. The informal name for the IBM Ultrium Internal Tape Drive, which is the predecessor of the Ultrium 2 Tape Drive (Generation 2). The Generation 1 drive has a native storage capacity of up to 100 GB per cartridge and a native sustained data transfer rate of 15 MB per second.
Generation 2. The informal name for the Ultrium 2 Tape Drive, which is the
gigabit (Gb). 1 000 000 000 bits. 1 Gb equals 100 MB.
gigabyte (GB). 1 000 000 000 bytes.
ground. An object that makes an electrical connection with the earth.
H
hard addressing. Pertaining to the Fibre Channel drive (Model T400F), a method that identifies the drive’s LID and, consequently, its AL_PA (the AL_PA enables the drive to communicate with other devices).
hardware. The physical equipment or devices that form a computer.
head. See drive head.
Head Resistance Measurements test. Part of the Test Head diagnostic, a procedure that determines whether the tape drive’s head works correctly. The test measures the head’s ability to withstand cracks and other defects.
host. The controlling or
hub. A communications device to which nodes on a
I
IBM TotalStorage LTO Ultrium 2 Tape Drive. A
ID. Identifier.
in. See inch.
inch. A unit of length equal to 1/36 yard or 25.4 mm.
initiator. In SCSI terms, a SCSI device that requests an I/O process to be performed by another SCSI device (a target). In many cases, an initiator can also be a target.